<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script type="text/javascript">
    let arr = [1,2,3];

    show(...arr);
    function show(a,b,c)
    {
      alert(a);
      alert(b);
      alert(c);
    }


    </script>
  </head>
  <body>

  </body>
</html>
